Turkey is employing one of the world’s oldest techniques to keep unwanted visitors out of its country: a wall.

A suicide bombing in Turkey on Monday that killed 32 prompted the decision to better secure 560 miles of border. The modular wall will include reinforced wire, floodlights, and extra ditches, Reuters reported Thursday.

“Critical sections [of the border] have been identified. Priority will be given to these areas, and measures will be taken with all technological capabilities,” Deputy Prime Minister and government spokesman Bulent Arinc told reporters, Reuters reported.

President Obama told Turkey’s President Tayyip Erdogan on Wednesday that the U.S. would help “stem the flow of foreign fighters.” An official said the modular wall is expected to cost $86 million, Reuters reported.

Roughly half of Turkey’s 40,000 border guards are now deployed along its border with Syria.